CN2831689Y - Neutron generator - Google Patents
Neutron generator Download PDFInfo
- Publication number
- CN2831689Y CN2831689Y CN 200520063836 CN200520063836U CN2831689Y CN 2831689 Y CN2831689 Y CN 2831689Y CN 200520063836 CN200520063836 CN 200520063836 CN 200520063836 U CN200520063836 U CN 200520063836U CN 2831689 Y CN2831689 Y CN 2831689Y
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- circuit
- anode
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- neutron
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Abstract
The utility model relates to a neutron generator, which comprises a neutron tube. The neutron tube comprises a casing body, a target pole, a target pole circuit, an input cathode, an anode output terminal and an anode circuit, wherein the target pole circuit is connected with a target phase; the anode circuit is connected with an anode; one end of the casing body is provided with a target which is positioned in the target bottom; the middle part in the casing body is provided with an accelerating electrode; the other end of the casing body is provided with the anode and a cathode; the anode is connected with an anode input terminal which is connected with a memorizer; the cathode is connected with a cathode output terminal. The utility model controls the radioactivity of a radioactive source through a switch of a power supply; once the power supply is cut off, the radioactivity stops simultaneously. The intensity of the radioactivity is controlled through voltage so that the radioactive source is effectively controlled. The utility model is suitable for being used as a teaching appliance for modern physical experiments and nucleonic experiments in various schools. In addition, the utility model is widely used for oil exploration, seed amelioration and the radiotherapy of cancer.
Description
[technical field]
The utility model relates to a kind of neutron generator, especially relates to a kind of radioactivity that just has when power-on, in case and powered-down radiates the intensity that stops simultaneously and radiate and controls neutron generator by voltage.
[background technology]
Along with the attention of the Ministry of Education of the state to Experiments of Modern Physics and nuclear physics experiment, the investigation of the 3rd national institution of higher education physics experiment teaching someone will propose in last year: Experiments of Modern Physics and nuclear physics experiment will account for 1/3rd of experiment.And at present the most schools of China do not possess this experiment condition, and these schools just can not carry out the kinds of experiments such as measurement, neutron activation analysis in measurement, the neutron fission cross section of measurement, the neutron-capture cross section in nuclear fusion experimental, nuclear fission experiment, the measurement of measuring neutron flux, neutron total cross-section, neutron scattering cross section by the requirement of the Ministry of Education of the state.Simultaneously, because other nuclear physics experiment all needs various radioactive source, radioactive source is very big to the influence of environment, is unfavorable for environmental protection, and there are very strict system and requirement in the management and the use country of radioactive source.
Meanwhile, utilize radioactive source to carry out that various aspects such as cancer radiotherapy have purposes widely in oil exploration, biological breeding, ameliorating seed and the medical domain, and existing nuclear radiological unit ubiquity the unmanageable shortcoming of radioactivity of cost height, radioactive source.
[utility model content]
The unmanageable shortcoming of radioactivity of cost height, radioactive source in order to overcome existing nuclear radiological unit ubiquity, the utility model provides a kind of radioactivity that just has when power-on, in case and powered-down radiates the intensity that stops simultaneously and radiate and controls neutron generator by voltage.
The technical scheme that its technical problem that solves the utility model adopts is: neutron generator, comprise neutron tube, described neutron tube comprises housing, the target utmost point, target polar circuit, input negative electrode, anode output end and anode circuit, the target polar circuit is connected with target, anode circuit is connected with anode, one end of described housing is equipped with target, in target places at the bottom of the target, mid portion in the housing is equipped with accelerating electrode, the other end of housing is provided with anode and negative electrode, anode is connected with the anode input, and the anode input is connected with holder, and negative electrode is connected with output cathode.
Described anode circuit comprises DC power supply and oscillator, and described oscillator links to each other with the two-way delay circuit respectively, and No. one delay circuit is delivered to clock circuit, after connect pulse former, connect synchronous circuit again; Another road delay circuit is delivered to power pushing circuit, after connect power switch circuit, be delivered to transformer again, connect the pulse former that links to each other with anode again, be delivered to respectively then and observe the ionization circuit and detect the anode current circuit, detect the anode current circuit and be connected with feedback network circuit, feedback network circuit inputs to getter filament power supply circuits.
Described target polar circuit comprises DC power supply, and DC power supply is delivered to DC converter, after be delivered to the transformer booster circuit, be delivered to the dupler circuit again, the dupler circuit is connected with the target utmost point, is delivered to high-tension circuit and line circuit respectively by the dupler circuit; Another road circuit is delivered to filter circuit by DC power supply, forms the direct current of 15V then to voltage stabilizing circuit, is delivered to control circuit again.
Described housing be shaped as the cylinder bodily form.
Good effect of the present utility model is: control the radioactivity of radioactive source by the switch of power supply, in case and powered-down, radioactivity stops simultaneously, the intensity of radiation is controlled by voltage, makes radioactive source obtain effective control.The utility model is adapted to the instruments used for education of all kinds of schools as Experiments of Modern Physics and nuclear physics experiment, simultaneously purposes is widely being arranged aspect the radiotherapy of oil exploration, seed station and cancer.
[description of drawings]
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model neutron tube structural representation.
Fig. 2 is the frame principle figure of anode circuit described in the utility model and described target polar circuit;
Fig. 3 is the graph of a relation that the utility model anode current changes with the holder electric current.
Among the figure: at the bottom of the 1-target, the 2-target utmost point, the 3-accelerating electrode, the 4-housing, the 5-output cathode, the 6-anode output end, the 7-anode, the 8-negative electrode, the 9-magnetic patch, the 10-memory, 11-120VDC, 12-oscillator, the 13-delay circuit, the 14-clock circuit, 15-pulse former, 16-synchronous circuit, the 17-delay circuit, the 18-power pushing circuit, 19-switching circuit, 20-transformer, the 21-pulse former, 22-observes the ionization circuit, and 23-detects anode current circuit, 24-feedback network circuit, 25-getter filament power supply circuits, 30-DC converter circuit, 31-transformer booster circuit, 32-dupler circuit, the 33-high-tension circuit, 34-250VDC, 35-filter circuit, 36-voltage stabilizing 15V circuit, the 37-control circuit, 38-line circuit.
[embodiment]
Referring to Fig. 1, what Fig. 1 was represented is structural representation of the present utility model, a kind of neutron generator, comprise neutron tube, this neutron tube comprises housing 4, the target utmost point 2, target polar circuit, output cathode 5, anode output end 6 and anode circuit, the housing 4 of neutron tube adopts high-intensity ceramic material to make housing 4, and shell 4 is of a size of the cylinder of Φ 48mm * L200mm; Adopt advanced process for sealing, use advanced inflating and exhausting system and adopt high-intensity pottery to make shell, make that the neutron tube of the utility model made is that vacuum performance or withstand voltage properties are all very high, can satisfy the requirement of various situations.
Referring to Fig. 2, Fig. 2 is a circuit block diagram of the present utility model, and the target polar circuit is connected with the target utmost point 2, and anode circuit is connected with anode 7, one end of described housing 4 is equipped with target, target places at the bottom of the target in 1, and the mid portions in the housing 4 are equipped with accelerating electrode 3, and the other end of housing 4 is provided with anode 7 and negative electrode 8, anode 7 is connected with anode input 6, anode input 6 is connected with holder 10, and anode 7 electric currents change with holder 10 electric currents, and its relation curve as shown in Figure 3.As can be seen from the figure: the less variation of holder 10 electric currents can cause the bigger variation of anode 7 electric currents.Therefore, require holder 10 very stably to work; Negative electrode 8 is connected with output cathode 5.
The utility model anode circuit comprises 120VDC DC power supply 11 and oscillator 12, and this oscillator 12 links to each other with 17 with two-way delay circuit 13 respectively, and No. one delay circuit 13 is delivered to clock circuit 14, after connect pulse former 15, connect synchronous circuit 16 again; Another road delay circuit 17 is delivered to power pushing circuit 18, after connect power switch circuit 19, be delivered to transformer 20 again, connect the pulse former 21 that links to each other with anode 7 again, be delivered to respectively then and observe ionization circuit 22 and detect anode current circuit 23, detect anode current circuit 23 and be connected with feedback network circuit 24, feedback network circuit 24 inputs to getter filament power supply circuits 25.
The utility model polar circuit that hits comprises 120VDC DC power supply 11,120VDC DC power supply 11 is delivered to DC converter 30, after be delivered to transformer booster circuit 31, be delivered to dupler circuit 32 again, dupler circuit 32 is connected with the target utmost point 2, is delivered to high-tension circuit 33 and line circuit 38 respectively by dupler circuit 32; Another road circuit is delivered to filter circuit 35 by 250VDC DC power supply 34, forms the direct current of 15V then to voltage stabilizing circuit 36, is delivered to control circuit 37 again.
In actual use,, adopt paraffin to make moderator, with boron chloride proportional counter tube detected neutron in order to understand the relative intensity of neutron.The relative intensity of neutron can write down measurement with scaler and multichannel analyser.When accelerating voltage and anode voltage one regularly, the relation that records the relative yield of neutron and educt beaming flow is as shown in the figure.Fig. 3 is at fixed anode voltage and line, the graph of a relation of the comparative counting of accelerating voltage and neutron.As can be seen from Figure 3, neutron yield is pressed index law with accelerating voltage and is changed, and accelerating voltage is 1.77 times at the ratio of the neutron comparative counting of 100,000 volts and ten second of the three ten-day periods of the hot seasons.Therefore, increasing the accelerating voltage value is the valid approach that increases neutron yield.As can be seen from the figure the relative yield of neutron and educt beaming flow are linear relationship basically.Holder electric current and accelerating voltage are certain among the figure, the anode voltage that records and relation curve, from figure, find the relation of their relation corresponding to anode voltage and electric current.
Utilize 14MEV, in fast neutron and the copper sheet
63CU, the generation nuclear reaction-
63Cu (n, 2n)
62Cu measures
62The positron intensity of Cu compares with standard β source, and then definite neutron yield.Draw at accelerating voltage VH=120KV, IB=100uA, neutron yield is 1 * 10
8Neutron/second.
We have also carried out life test simultaneously, and neutron tube is at accelerating voltage 100KV---120KV, and continuous operation is 360 hours under the condition of line 100UA, and the performance of neutron tube does not have significant change.Wherein under dc state, worked 150 hours, worked under the pulse condition 100 hours.
The utility model is controlled the radioactivity of radioactive source by the switch of power supply, in case and powered-down, radioactivity stops simultaneously, the intensity of radiation is controlled by voltage, makes radioactive source obtain effective control.The utility model is adapted to the instruments used for education of all kinds of schools as Experiments of Modern Physics and nuclear physics experiment, simultaneously purposes is widely being arranged aspect the radiotherapy of oil exploration, seed station and cancer.
Claims (4)
1, a kind of neutron generator, comprise neutron tube, it is characterized in that: described neutron tube comprises housing, the target utmost point, target polar circuit, input negative electrode, anode output end and anode circuit, the target polar circuit is connected with target, anode circuit is connected with anode, one end of described housing is equipped with target, in target places at the bottom of the target, mid portion in the housing is equipped with accelerating electrode, the other end of housing is provided with anode and negative electrode, anode is connected with the anode input, and the anode input is connected with holder, and negative electrode is connected with output cathode.
2, neutron generator according to claim 1, it is characterized in that: described anode circuit comprises DC power supply and oscillator, and described oscillator links to each other with the two-way delay circuit respectively, and No. one delay circuit is delivered to clock circuit, after connect pulse former, connect synchronous circuit again; Another road delay circuit is delivered to power pushing circuit, after connect power switch circuit, be delivered to transformer again, connect the pulse former that links to each other with anode again, be delivered to respectively then and observe the ionization circuit and detect the anode current circuit, detect the anode current circuit and be connected with feedback network circuit, feedback network circuit inputs to getter filament power supply circuits.
3, neutron generator according to claim 1, it is characterized in that: described target polar circuit comprises DC power supply, DC power supply is delivered to DC converter, after be delivered to the transformer booster circuit, be delivered to the dupler circuit again, the dupler circuit is connected with the target utmost point, is delivered to high-tension circuit and line circuit respectively by the dupler circuit; Another road circuit is delivered to filter circuit by DC power supply, forms the direct current of 15V then to voltage stabilizing circuit, is delivered to control circuit again.
4, neutron generator according to claim 1 is characterized in that: described housing be shaped as the cylinder bodily form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520063836 CN2831689Y (en) | 2005-09-05 | 2005-09-05 | Neutron generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520063836 CN2831689Y (en) | 2005-09-05 | 2005-09-05 | Neutron generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831689Y true CN2831689Y (en) | 2006-10-25 |
Family
ID=37136610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520063836 Expired - Lifetime CN2831689Y (en) | 2005-09-05 | 2005-09-05 | Neutron generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2831689Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937671A (en) * | 2012-11-23 | 2015-09-23 | 彼得·泰莱基 | Combined moderator/target for neutron activation process |
-
2005
- 2005-09-05 CN CN 200520063836 patent/CN2831689Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937671A (en) * | 2012-11-23 | 2015-09-23 | 彼得·泰莱基 | Combined moderator/target for neutron activation process |
| US10706982B2 (en) | 2012-11-23 | 2020-07-07 | Péter Teleki | Combined moderator/target for neutron activation process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20091216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |